Trump’s decision to send the National Guard into Washington, D.C., will be defended as a matter of national security. History teaches us this is not about protecting the people at all. The National Guard was deployed to protect the political class from the people. The United States is now following the same path we have seen throughout history. In ancient Rome, once the Praetorian Guard was stationed in the city to guard the emperor, it became the power behind the throne. Their loyalty was to themselves and the politicians in control at the moment. The guard was not sent to...